Thermco GW306H Combined Form Density Hydrometer, ASTM 306H, 900 to 950kg/m3 Range, 0.5kg/m3 Division, 20/65°C Temperature Range, 330mm Length

For determining metric density of petroleum products. Manufactured in strict accordance with ISO standards to serve users involved in the international transportation of petroleum products. Adopted by ASTM and their use sanctioned as the metric standard of petroleum hydrometers/thermometers. Suitable for certification for use as a primary reference standard. A certificate is provided to indicate instrument traceability to standards provided by the National Institute of Standards and Technology.